举一反三
- 中国大学MOOC: Water i________ a liquid made up of molecules of hydrogen and oxygen in the ratio of 2 to 1.
- It ’ s high time we _____cutting down the rain forests.
- The method Nourishing kidney-yin to promote liver-yin deficiency is established on the basis of （ ）。 A: Water generating wood. B: Fire generating earth C: Water restricting fire. D: Wood restricting earth.
- Moisture in food can be divided into "bound water" and "free water" according to different properties. Which of the following is not bound water? A: The first layer of water molecules adsorbed to glucose molecules B: Water molecules with unpaired electrons entering the outer empty orbits of sodium ions C: Water molecules adsorbed in capillaries in food tissue D: Water molecules bound to the negative ion of glutamic acid on the protein peptide chain
- Which statement of the following is false according to the passage A: The boiling point of water on a mountain three kilometers high is only 90 Celsius. B: It would take you longer to cook potatoes in boiling water on the mountain than it would at sea level. C: When the temperature of a liquid is raised enough, the liquid boils. D: The boiling point of water on a mountain six kilometers high is 95 Celsius.
内容
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After being ________, the particles of water unite and form clouds; then they fall down in the form of fog, rain, snow, or hail.
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a clear liquid, without colour or taste, which falls from the sky as rain and is necessary for animal and plant life 未知类型：{'label': 'questionDesc', 'content': '请根据题干的描述选择合适的词语。', 'isMemberControl': 0, 'type': 181} A: same B: water C: wonderful D: feel
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Scattering is the change in the direction of electromagnetic energy caused by ( ). A: Particles suspended in the atmosphere B: Water droplets C: Large molecules of atmospheric gases D: Dust
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But for water, it ____impossible to live in the earth.
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Water supplies are cut A: because the channels are broken B: because of the high temperature C: because wells are drying up D: because of the rain